Find the value of f(2) using the above formulae
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if 2f(x)-f(1/x)=5x,then find the value of f(2)?

Use x = 2, and x = 1/2.

2f(2) - f(1/2) = 10 ----- (1)

2f(1/2) - f(2) = 5/2 ----- (2)

2*(1) + (2).

4f(2) - f(2) = 20 + 5/2

3 f(2) = 22 1/2

f(2) = 7 1/2

by Level 11 User (80.5k points)

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